This is a new patch for the PC version of the game. It is recommended for all PC users.

Changelist is as follows:
# Added Version number update in launcher.
# Rogue Jedi's tunic is now visible during gameplay.
# Emperor's arms are now visible during gameplay.
# Fixed parts of the "Dark Lord's Armor" from continually bouncing.
# DMM performance increase.
# General performance increase on all supported configurations.

Do you need both patches to get all the benefits? I see this patch is 414 mb.